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94 lines
3.4 KiB
Bash
94 lines
3.4 KiB
Bash
# Call: prepare_tmpfs_for "NAME_OF_TMPFS_DIR" "${PATH_TO_DIR}" # this adds its own cleanup handler
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function prepare_tmpfs_for() {
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declare tmpfs_name="${1}"
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declare tmpfs_path="${2}"
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# validate parameters
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if [[ -z "${tmpfs_name}" ]]; then
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exit_with_error "prepare_tmpfs_for: tmpfs_name (arg 1) is empty"
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fi
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if [[ -z "${tmpfs_path}" ]]; then
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exit_with_error "prepare_tmpfs_for: tmpfs_path (arg 2) is empty"
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fi
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# params for the handler; initially just repeat our own params
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declare -a cleanup_params=("${tmpfs_name}" "${tmpfs_path}")
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# create the dir if not exists and note that down for the cleanup handler
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if [[ ! -d "${tmpfs_path}" ]]; then
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display_alert "prepare_tmpfs_for: creating dir" "${tmpfs_path}" "cleanup"
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mkdir -p "${tmpfs_path}"
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cleanup_params+=("remove_dir")
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else
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display_alert "prepare_tmpfs_for: dir exists" "${tmpfs_path}" "cleanup"
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cleanup_params+=("no_remove_dir")
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fi
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# Do nothing if we're not on Linux (detect via OSTYPE) and root. Still, setup the cleanup handler.
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if [[ "${OSTYPE}" != "linux"* ]] || [[ "${EUID}" -ne 0 ]]; then
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display_alert "prepare_tmpfs_for: not on Linux or not root, skipping" "${tmpfs_name}" "cleanup"
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cleanup_params+=("no_umount_tmpfs")
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elif [[ "${ARMBIAN_INSIDE_DOCKERFILE_BUILD}" == "yes" ]]; then
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display_alert "prepare_tmpfs_for: inside Dockerfile build, skipping" "${tmpfs_name}" "cleanup"
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cleanup_params+=("no_umount_tmpfs")
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else
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display_alert "prepare_tmpfs_for: on Linux and root, MOUNTING TMPFS" "${tmpfs_name}" "cleanup"
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# mount tmpfs on it
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mount -t tmpfs tmpfs "${tmpfs_path}"
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cleanup_params+=("umount_tmpfs")
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#cleanup_params+=("no_umount_tmpfs")
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fi
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# add the cleanup handler
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declare cleanup_handler="cleanup_tmpfs_for ${cleanup_params[*]@Q}"
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display_alert "prepare_tmpfs_for: add cleanup handler" "${cleanup_handler}" "cleanup"
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add_cleanup_handler "${cleanup_handler}"
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return 0
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}
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function cleanup_tmpfs_for() {
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declare tmpfs_name="${1}"
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declare tmpfs_path="${2}"
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declare remove_dir="${3}"
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declare umount_tmpfs="${4}"
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# validate parameters
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if [[ -z "${tmpfs_name}" ]]; then
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exit_with_error "cleanup_tmpfs_for: tmpfs_name (arg 1) is empty"
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fi
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if [[ -z "${tmpfs_path}" ]]; then
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exit_with_error "cleanup_tmpfs_for: tmpfs_path (arg 2) is empty"
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fi
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if [[ -z "${remove_dir}" ]]; then
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exit_with_error "cleanup_tmpfs_for: remove_dir (arg 3) is empty"
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fi
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if [[ -z "${umount_tmpfs}" ]]; then
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exit_with_error "cleanup_tmpfs_for: umount_tmpfs (arg 4) is empty"
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fi
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# umount tmpfs
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if [[ "${umount_tmpfs}" == "umount_tmpfs" ]]; then
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display_alert "cleanup_tmpfs_for: umount tmpfs" "${tmpfs_name}" "cleanup"
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cd "${SRC}" || echo "cleanup_tmpfs_for: cd failed to ${SRC}" >&2 # avoid cwd in use error
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umount "${tmpfs_path}" || {
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display_alert "cleanup_tmpfs_for: umount failed" "${tmpfs_name} tmpfs umount failed" "err"
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# Show last-resort what's in there / what's using it to stderr
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ls -la "${tmpfs_path}" >&2 || echo "cleanup_tmpfs_for: ls failed" >&2
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lsof "${tmpfs_path}" >&2 || echo "cleanup_tmpfs_for: lsof dir failed" >&2
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}
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else
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display_alert "cleanup_tmpfs_for: not umounting tmpfs" "${tmpfs_name}" "cleanup"
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fi
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# remove the dir if we created it
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if [[ "${remove_dir}" == "remove_dir" ]]; then
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display_alert "cleanup_tmpfs_for: removing dir" "${tmpfs_path}" "cleanup"
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rm -rf "${tmpfs_path:?}"
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else
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display_alert "cleanup_tmpfs_for: not removing dir" "${tmpfs_path}" "cleanup"
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fi
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return 0
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}
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